研究目的
To theoretically propose and experimentally demonstrate a topological transition by tuning the vertical electromagnetic parameters of the anisotropic medium, leading to the realization of linear-crossing metamaterials (LCMMs) for focusing and super-resolution with partial cloaking.
研究成果
The study successfully demonstrates another topological transition leading to the realization of LCMMs, which can be used for directional propagation, splitting, slab-focusing, and super-resolution with partial cloaking. The experimental results in the microwave regime validate the theoretical predictions, opening new avenues for controlling light propagation in planar-integrated photonics.
研究不足
The study is primarily focused on 2D cases, and while it suggests adaptability to 3D cases, the practical realization and demonstration in 3D are not covered. The experimental setup is limited to the microwave regime, and the applicability to other frequency ranges is not explored.
1：Experimental Design and Method Selection:
The study involves designing and fabricating LCMMs based on 2D transmission lines (TLs) with lumped elements in the microwave regime to demonstrate super-resolution imaging with partial cloaking.
2：Sample Selection and Data Sources:
The experimental sample is composed of four parts based on 2D TLs, fabricated on a commercial printed-circuit board, FR-4, with specific permittivity and permeability.
3：List of Experimental Equipment and Materials:
The setup includes a vector network analyzer (Agilent PNA Network Analyzer N5222A), SMA connectors, and a homemade rod antenna for measuring electric fields.
4：Experimental Procedures and Operational Workflow:
The experiment involves loading series-lumped capacitors and shunted-lumped inductors into the TLs to realize effective LCMMs, followed by measuring the electric field distributions to demonstrate super-resolution imaging with partial cloaking.
5：Data Analysis Methods:
The normalized electric field distributions are analyzed to demonstrate the focusing and super-resolution effects, with comparisons made between cases with and without defects.
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